Experimental study on the load-area relation of rough surfaces and comparison with theoretical model

Liang, Xuanming; Jiang, Chunyun; Wang, Meng-Rui; Dai, Wanlin; Wang, Gangfeng

doi:10.1016/j.euromechsol.2023.104934

Cited by 6 publications

(8 citation statements)

References 39 publications

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“…Recently, Wang et al [14][15][16]27] proposed a series of incremental contact models, which can deal with rough contact problems of different materials, including elastic, elastic-perfectly plastic, and strainhardening plastic solids, as well as solids with strain gradient plasticity. In this work, the model is extended to account for the contact of hyperelastic solids.…”

Section: The Incremental Equivalent Circular Contact Model Accounting...mentioning

confidence: 99%

An incremental contact model for hyperelastic solids with rough surfaces

Jiang

Liang

2023

Preprint

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Hyperelastic materials like gels and rubbers have numerous applications in daily life and industrial production. However, most traditional contact models for rough solids do not include the hyperelastic deformation mechanism. This paper extends the linear-elastic incremental equivalent contact model to study the contact processes of hyperelastic rough solids. For any specific surface separation, the contact stiffness is determined by the total area and number of the contact patches, as well as the instantaneous tangent modulus. Analogous to buckle theory, we introduce the hyperelasticity of materials through employing the tangent modulus. By integrating the stiffness of contact spots, the normal contact force is then obtained. The load-area relation predicted by the present model exhibits consistency with finite element results even up to a contact area fraction of 90%. For hyperelastic solids with self-affine fractal rough surfaces, we investigate the effect of surface morphologies on contact behaviors. This research will be helpful for further studies about the lubrication, leakage, and wear of contact interfaces.

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Section: The Incremental Equivalent Circular Contact Model Accounting...mentioning

confidence: 99%

An incremental contact model for hyperelastic solids with rough surfaces

Jiang

Liang

2023

Preprint

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“…Lubricants 2024, 12, x FOR PEER REVIEW 6 of 14 and the numbers of contact patches could be determined based on the intensity of the pixels by employing digital image processing in MATLAB2020b [17].…”

Section: Contact Experiments On the Hyperelastic Rough Surfacementioning

confidence: 99%

“…Due to the presence of half-wave losses [37], the image captured using the CMOS exhibited a notably darker appearance in the actual contact regions. Subsequently, the contact area and the numbers of contact patches could be determined based on the intensity of the pixels by employing digital image processing in MATLAB2020b [17].…”

Section: Contact Experiments On the Hyperelastic Rough Surfacementioning

confidence: 99%

“…Recently, Wang [15] adopted the Abbott-Firestone curve (cumulative distribution function) to represent the rough surface topography and put forward an incremental contact model for elastic and elastoplastic rough surfaces. This model was validated by the finite element method [15,16] (FEM) and experiments [17], focusing on the relative contact area within the 15% range. These aforementioned contact theories could contribute to the realization of the mechanism of rough surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…The optical technique can conveniently obtain the real contact area by identifying the changes in the light rays at the contact position. Liang [17] and Li [40] utilized the frustrated total internal reflection technique (FTIR) for studying the elastoplastic deformation of metals that possess super catoptric performance. As an alternative optical technique, Hertz pioneered the use of interferometric techniques to measure surface separation and established the foundation for the field of contact mechanics [42].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Investigation of an Incremental Contact Model for Hyperelastic Solids Using an In Situ Optical Interferometric Technique

Zheng,

Jiang

2024

Lubricants

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The intricacies of rough surface contact are amplified by hyperelastic materials, primarily due to nonlinear enhancement caused by stress concentration. In previous studies, we proposed an incremental contact model for hyperelastic materials based on the tangent modulus and validated it through finite element simulations. This study proceeds with the experimental validation of the model. Initially, four hyperelastic rough surfaces were scanned and stitched together using a white light interferometer to obtain the whole surface topography. Subsequently, in situ optical interferometric techniques precisely measured the actual contact areas between these four samples and quartz glass, establishing the relationship between the load and contact area. Finally, by incorporating the surface topography into the incremental contact model for hyperelastic materials using profile theory, predictions of the relationship between load and contact area were made and compared with the experimental results. Significant agreement was found within nearly 90% of the relative contact area, which validated the model’s efficacy. The importance of this model extends to practical domains, such as wear, sealing, and contact surface safety research.

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An Incremental Contact Model for Hyperelastic Solids with Rough Surfaces

Jiang,

Liang

2023

Tribol Lett

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Experimental study on the load-area relation of rough surfaces and comparison with theoretical model

Cited by 6 publications

References 39 publications

An incremental contact model for hyperelastic solids with rough surfaces

An incremental contact model for hyperelastic solids with rough surfaces

Experimental Investigation of an Incremental Contact Model for Hyperelastic Solids Using an In Situ Optical Interferometric Technique

An Incremental Contact Model for Hyperelastic Solids with Rough Surfaces

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